C. 1990 Vintage Purple Jasper and Purple Chalcedony Bypass Ring in 14kt Yellow Gold. Size 6

14KT: Karat (abbreviated kt or K) is a unit that indicates the purity of gold in the metal. 14kt is 58.33% gold. In the United States, 14K yellow gold is most favored and used in jewelry.

YELLOW GOLD: Gold is a precious metal with a natural yellow color. It is quite soft and often alloyed with other metals to increase its strength. The purity of the metal is indicated by a unit called a "karat," with 24kt having the highest percentage of natural gold.

CHALCEDONY: a family of minerals that is often milky gray or bluish in color. Chalcedony includes a number of stones including onyx (black), carnelian (waxy red), agate (wide ranging palette) and bloodstone (brownish red.)

CARVED: When a gemstone is cut so that the outline or surface takes the form or likeness of a specific image or pattern.

JASPER: A naturally patterned stone, jasper is found in the shades of red, brown, green and yellow. The stone's markings can vary from slight speckling to designs that resemble a natural landscape. Jasper adds a rich, earthy element to necklaces, bracelets, earrings and rings.